Hitachi RAS-25JX4 Service Manual

Room air conditioner

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Instruction manual (37 pages)

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Page 1 (+5) (+47) ※ ※ ※ ※ NET WEIGHT (kg) After installation ※ SPECIFIC TIONS ND P RTS RE SUBJECT TO CH NGE FOR IMPROVEMENT ROOM IR CONDITIONER INDOOR UNIT + OUTDOOR UNIT M RCH 2005 Hitachi Household ppliance (Wuhu) Co.,Ltd.
Page 2 AFETY DURING REPAIR WORK 1. In order to disassemble and repair the unit in question, be sure to disconnect the power cord plug from the power outlet before starting the work. 2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit, and the replacement must be effected in correct manner according to the instructions in the Service Manual of the unit.
Page 3 ORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1. Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufactures during maintenance and handling thereof. (They apply the same to handling of abnormal goods such as rejected goods being returned.) 2.
Page 4 (6) Use a three wire type soldering iron including a grounding wire. Metal plate (of Al. stainless steel, etc.) Bare copper wire (for body earth) Working table Resistor 1M (1/2W) Staple Earth wirte ig.3 Grounding of the working table soldering iron Grounding wire Screw stop at the screwed part using a rag plate...
Page 5 AUTION In quiet operation or stopping the running, slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally, but this noise is not abnormal for the operation. When it thunders near by, it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety.
Page 6 PECIFICATION RAS-25JX4 RAC-25JX4 MODEL RAS-35JX4 RAC-35JX4 FAN MOTOR 40W (DC350V) 25W (DC35V) FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR Ñ ATC092SD-A8JT COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR OVERHEAT PROTECTOR FUSE (for MICROPROCESSOR) 3.0A POWER RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH...
Page 24 ONSTRU TION AND DIMENSIONAL DIAGRAM MODEL RAS-25JX4, RAS-35JX4 INDOOR UNIT Unit : mm Service space Top air suction grill Front panel Mounting plate Cabinet Horizontal Air outlet air diflector Wireless remote Ventilation hole controller Drain When piping is ※ drawn from the left side,...
Page 25 MODEL RAC-25JX4, RAC-35JX4 OUTDOOR UNIT Unit : mm (19.5) (26) 27.5 Handle Air outlet Air suction Handle Rear side Air suction Holed for anchor bolt 16 slots for 8.0 bolt) φ × φ Notch for anchor bolt (for 2- 8.0 bolt) φ...
Page 26 AIN PARTS CO PONENT THER OSTAT Thermostat Specifications MODEL RAS-25JX4, RAS-35JX4 THERMOSTAT MODEL OPERATION MODE COOL HEAT 16.7 (62.1) 18.7 (65.7) INDICATION 16.0 (60.8) 19.3 (66.7) TEMPERATURE 24.7 (76.5) 26.7 (80.1) INDICATION ûC ( ûF) 24.0 (75.2) 27.3 (81.1) 32.7 (90.9) 34.7 (94.5)
Page 27 OMPRESSOR MOTOR Compressor Motor Specifications MODEL RAC-25JX4, RAC-35JX4 ITEM COMPRESSOR TYPE ATC092SD-A8JT DC 270 - 320 V POWER SOURCE OUTPUT 750W (U ) WHITE WINDING (W ) YELLOW 2M = 0.63 20 ûC RESISTANCE (½ ) 75 ûC 2M = 0.76 YELLOW WHITE COMPRESSOR...
Page 28 IRING DIAGRAM CAUTION MODEL RAS-25JX4 / RAC-25JX4 RAS-35JX4 / RAC-35JX4 The marked parts very important ones for safety. INDOOR UNIT SINGLE PHASE AC220-230V 50HZ TERMINAL CONNECTING POWER BOARD CORD SWITCH ３４Ａ２１Ｂ THERMAL GRN & YEL Ｃ...
Page 30 MODEL RAS-25JX4, RAS-35JX4 １２３４５６７８９１０１１１２１３１４１５１６ＣＮ７ＸＡ- ２Ｐ -Ｔｏｐ２１２Ｖ...
Page 31 MODEL RAC-25JX4, RAC-35JX4 １２３４５６７８９１０１１１２１３１４１５１６・ＭＯＵＮＴＩＮＧ・ＢＯＡＲＤＡ...
Page 32 Setting Method of "Mutual Interference Prevention" of emote Controls emote control ( A -3E1) If more than one room air conditioners are installed in proximity and interference problem where all of those air conditioners receive ON / OFF signal from a remote control occurs, such interference may be eliminated by carrying out the setting as follows.
Page 33 RINTED WIRING BOARD LOCATION DIAGRAM MODEL RAS-25JX4, RAS-35JX4 MAIN P.W. B. MARKING ON P.W. B. COMPONENT SIDE SOLDERING SIDE...
Page 34 MODEL RAS-25JX4, RAS-35JX4 RECEIVING AND DISPLAY P.W.B. MARKING ON P.W.B. COMPONENT SIDE SOLDERING SIDE (COMPONENT SIDE VIEW) SWITCHING P.W.B. MARKING ON P.W.B. COMPONENT SIDE SOLDERING SIDE (COMPONENT SIDE VIEW) DIRT SENSOR (GAS SENSOR) P.W.B. MARKING ON P.W.B. SOLDERING SIDE COMPONENT SIDE...
Page 35 MODEL RAC-25JX4, RAC-35JX4 POWER P.W.B. MARKING ON P.W.B. COMPONENT SIDE...
Page 36 MODEL RAC-25JX4, RAC-35JX4 MAIN P.W. B. MARKING ON P.W. B. COMPONENT SIDE SOLDERING SIDE...
Page 37 LOCK DIAGRAM MODEL RAS-25JX4 / RAC-25JX4 RAS-35JX4 / RAC-35JX4 INDOOR UNIT OUTDOOR UNIT Outdoor DC fan motor Power source 1¿ 50Hz 220-230V HARMONICS POWER POWER RELAY IMPROVEMENT RECTIFIER SWITCH CIRCUIT Inrush current DC compressor Protection circuit motor Rotor magnetic pole position...
Page 38 ASIC MODE MODEL RAS-25JX4, RAS-35JX4 Air Purifier OFF ON Room temperature Silent Operates at "Silent" regardless of Silent Set to "Silent" in modes other than when the room temperature. the compressor stops.
Page 39: Table Of Contents
1 Mode data file RAS-25JX4 RAS-35JX4 LABEL NAME WMAX 4200 min-1 5300 min-1 WMAX2 4200 min-1 5300 min-1 WSTD 4000 min-1 5100 min-1 WJKMAX 3500 min-1 4500 min-1 WBEMAX 3300 min-1...
Page 40: Min-1
Table 1 Thermo judgment Item Temperature Thermo judgment ( N) 30¡C Room CLMXTP temperature Thermo judgment ( FF) 32¡C Room temperature Thermo judgment ( N) 31¡C utdoor temperature Thermo judgment ( FF) 33¡C Temperature set for cooling and dehumiditying (value set by remote control [+]) Table 2 Compressor rpm 20min.
Page 41: Min-1
Cooling Sleep Operation One-More Timer Dehumidifying Operation When time setting reservation is 1, 2 or 3 hours. Room temperature SFTMOR Setting 0.5hr One-more timer inhibited 30min. Set to 2 hours One-more timer monitoring 1 hour Sleep button Max. 4 hours Start Stop button...
Page 42: Min-1
Table 3 Compressor rpm asic Heating Operation Temperature Calculated difference compressor rpm (with shift value) 2150 min 1.66¡C 2650 min 2.00¡C Heating set temperature 3150 min 2.33¡C (remote control set temperature (+)) 3650 min 2.66¡C 4150 min 3.00¡C 4650 min 3.33¡C Dashed period 5150 min...
Page 43 Fresh ir In During Sleep Mode utomatic Two Way ir Exchange Mode Two-way air exchange lamp Operation lamp Remote control 1-hour cooling sleep reservation Indoor fan Fan Lo Operation mode set by remote control Timer lamp Horizontal air deflector Fan position Operation mode set by remote control Operation lamp Main unit operates...
Page 44 Heating Sleep Operation One-More Timer eversing Valve Defrosting ・ More than defrosting inhibiting period 15min. and above Auto fresh defrosting Room temperature 30sec. 30sec. Fan speed Stop Start/Stop button set to ÒHiÓ Defrost signal Preheating cancelled Preheating cancelled Preheating cancelled Preheating cancelled Preheating judgment Preheating...
Page 45 EF IGE ATING CYCLE DIAG AM MODEL RAS-25JX4 / RAC-25JX4 RAS-35JX4 / RAC-35JX4 Silencer Silencer...
Page 46 ESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAS-25JX4, RAS-35JX4 1. Reset Circuit NORMAL : HI RESET : LO Microcomputer R552 IC521 Fig. 1-1 Power "OFF" Power "ON" Voltage 5.0V Voltage supply to pin 2 of IC521 Reset enter at 4.2V Reset release at 4.4V Voltage 5.0V...
Page 47 . Receiver Circuit Q141 R212 R141 ZD141 C211 RECEIVER I/P R211 R611 C611 Microcomputer Fig.2-1 IRR (light receiver unit) receives the infrared signal from the wireless remote controller. The receiver amplifie and shapes the signal and outputs it. 3. Buzzer Circuit R721 IC711 Microcomputer...
Page 48 . Snap Motor Circuit (Horizontal Air Deflector, Ventilation Damper) １２ＶＣＮ５１Ｄ７３３２Ｒ７３５Ｍ３Ｑ７３３２２ φ ４４ＩＣ７１１５...
Page 49 5. Initial Setting Circuit (IC401) ¥ When power is supplied, the microcomputer reads the data in IC401(E PROM) and sets the preheating activation value and the rating and maximum speed of the compressor, etc. to their initial values. ¥ Data of self-diagnosis mode is stored in IC401; data will not be erased even when power is turned off.
Page 50 . Fan Motor Drive Circuit CN10 Micro computer DC fan Fan motor motor output R751 C751 DC fan motor Speed feedback R631 C631 Fig. 7-1 Voltage at point A Waveform T1 = Low speed T2 = High speed Voltage at point B Waveform Voltage at point C Waveform...
Page 51 . Ventilation Fan Motor Circuit K-12V CN11 Microcomputer VENTILATION DIFECTION R934 VENTILATION FAN OUTPUT Fig. 8-1 CN11 ③ Voltage waveform T1: Low-speed rotation T2: High-speed rotation Convert to analog voltage at the ventilation fan motor internal circuit. When T2 When T1 Fig.
Page 52 . Dirt Sensor (Gas Sensor) Circuit <Sensor Output characteristics> a Point Voltage Dirt Sensor Input R312 Dirt Sensor Microcomputer (Gas Sensor) IC501 GS421 Stability Time Dirty Air Return to Clean Air Dirt Sensor to be turned on. Fig. 9-1 The Dirt Sensor(Gas Sensor) works by making use of the change of resistance value which occurs with the gas-sensing element heated by the heater, depending upon the dirtiness of the air (gas).
Page 53 MODEL RAC-25JX4, RAC-35JX4 . The electrical parts for the outdoor unit is composed of two P.W.B. (a power P.W.B. and main P.W.B.) and a harmonics improvement circuit as shown in Fig. - . ¥ MAIN P.W.B. This P.W.B. is equipped with the rectification diode, DC fan motor control circuit and the circuits around the micro computer which take various controls.
Page 54 . Power circuit This circuit is to convert the power from AC which is provided from the terminal A and B to DC voltage And produces an AC current which does not exceed the harmonic amplitude limit of the IEC61000-3-2. When the compressor is stopped, the AC voltage becomes about 300 V and while the compressor operates, it is about 280 V.
Page 55 (3) C021 and C022 This smoothes the voltage rectified for operating the compressor. When the input voltage is taken for the sine wave as shown in the top of Fig. 2-4, it is rectified by the DB2 and becomes the waveform as shown in the middle of Fig.
Page 56 . Indoor/Outdoor Interface Circuit The interface circuit superimposes an interface signal on the DC 35V line to perform communications between indoor and outdoor units. This circuit consists of a transmitting circuit which superimposes an interface signal transmit from the microcomputer on the DC 35V line and a circuit which detects the interface signal on the DC 35V line.
Page 57 Fig. 3-1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other. Fig. 3-1...
Page 58 Outdoor microcomputer Pin Indoor microcomputer Pin 35V DC line 33ms. 100ms. 1 frame Leader Fig. 3-2 Voltages Waveforms of Indoor / Outdoor Microcomputers (Outdoor to Indoor Communications) Outdoor microcomputer Pin Indoor microcomputer Pin 35V DC line 4.95ms. 33ms. Transmit/receive 1 frame switching time Fig.
Page 59 ∼ ∼ ∼ ∼ ∼ ∼...
Page 60 Compressor minimum rotation speed(4 MSB) Compressor minimum rotation speed(3) Compressor minimum rotation speed(2) Compressor minimum rotation speed(1) Compressor minimum rotation speed(0 LSB) OVL up Fan-7-step request 15/20(A) Actual compressor rotation speed(5 MSB) Compressor command speed(7 MSB) Actual compressor rotation speed(4) Compressor command speed(6) Actual compressor rotation speed(3) Compressor command speed(5)
Page 61 . IPM (Intelligent Power Module) ¥ Fig.4-1 shows the intelligent power module and its peripheral circuit. The three transistors on the positive e side are called the upper arm, and the three transistors on the negative d side, the lower arm. Fig.
Page 62 Intelligent power module switches power supply current according to position of the compressor motor rotor. The switching order is as shown in Fig. 4-2. At point E : U is ON, V is ON (circuit in Fig.4-1) At point F : U is chopped (OFF), V is ON (circuit in Fig.4-4) Upper arm transistor...
Page 63 Fig. 4-4 Power module circuit (U is OFF, V is ON) Since current flows at point B only when U transistor and V transistor is ON, the current waveform at point B becomes intermittent waveform as shown in Fig.4-3. Since current at point B is approximately proportional to the input current of the air conditioner, input current is controlled by using DC current (Id) detection resistor.
Page 64 • IPM drive circuit The inverter driving device (IGBT) and the drive circuit are built in the IPM. The IPM receives the signal from the microcomputer and convert it to 0 – 15 V signal to drive the IGBT. When the unit operates at low speed, a chopper signal is emitted from the micro computer as shown in Fig.
Page 65 . Power Circuit for P.W.B. ¥ Fig. 5-1 shows the power circuit for P.W.B. AC220-230V C 0 0 7 C 0 1 2 C 0 1 4 C 0 0 8 C 0 1 3 C 0 1 5 R 4 3 R 4 4 Z D 0 2 Microcomputer...
Page 66 ¥ The voltage specification of the power circuit is as follows. <Check points> Output Voltage Main load Measuring points Potential failure modes spec. 11-13V MAIN P.W.B. (CN3, CN4) R701 (Ò12VÓ display) R006 (Ò0VÓ display) The unit wonÕt operate C21 (Ò12VÓ display) J27, J30 MAIN P.W.B.
Page 67 . Microcpomputer's Peripheral Circuits 6-1. Overload control circuit (OVL control circuit) Overload control is to decrease the speed of the compressor and reduce the load when the load on the air conditioner increases to an overload state, in order to protect the compressor, electronic components and power breaker.
Page 68 Detection DC Current Resistor Direct Current R003 R004 Q501 R513 Power P.W.B. R514 R906 Main P.W.B. R613 Microcomputer R612 R248 R245 − R222 CN4B CN4A C009 R005 D001 R287 D208 Reset output − Reset R288 R252 0V 0V 0V Main P.W.B. Fig.
Page 69 R003,R004,R608,R613, detect the DC voltage at the power circuit. The microcomputer receives a DC voltage and applies correction to the overload set value so the DC current will be low when the DC voltage is high. (Since the load level is indicated by the DC voltage multiplied by DC current, R247, R248, R249 are provided to perform the same overload judgement even when the voltage varies.) DC voltage : Low DC current : High...
Page 70 -2. Reset Circuit MAIN P.W.B. D208 R287 Microcomputer RESET OUT. − R252 RESET C204 IC5(1/2) R288 0V 0V 0V 0V Fig. 6-7 The reset circuit initializes the microcomputer program when Power is ÒONÓ from ÒOFFÓ. Low voltage at pin 48 resets the microcomputer , and HI activates the microcomputer. Fig.
Page 71 . Temperature Detection Circuit MAIN P.W.B. O.H. thermistor R304 R301 DEF. thermistor Microcomputer R305 C302 R302 Outdoor temperature thermistor CN10 R306 Outdoor temperature C302 R303 Fig. 7-1 The Over heat thermistor circuit detects the temperature at the surface of the compressor head, the Defrost. thermistor circuit detects the defrosting operation temperature.
Page 72 . Latch-Type Reversing Valve Control Circuit Latch-type Reversing valve is adopted for this model. Latch-type Reversing valve “slides” the valve in the direction specified for each operation mode to switch the refrigerant path. Switched refrigerant path will be retained with built-in permanent magnet. Latch-type Reversing valve slides the valve by letting the current flow in the Reversing valve coil for the specified period and in the specified direction.
Page 73 . Electric expansion valve control circuit POWER P.W.B. MAIN P.W.B. B-12V B-12V CN15 B-12V R403 R404 R401 Microcomputer PQ401 R293 Valve4 PQ402 R294 Valve3 Electric PQ403 R295 Valve2 expansion valve PQ404 R296 Valve1 CN4B CN4A 12 13 C401 B-0V Fig. 9-1 ¥...
Page 74 0. Outdoor DC Fan Motor control circuit This model uses DC Fan Motor which has a controller circuit built in the Motor. This DC Fan Motor will rotate by control voltage apply to Vsp input. (Voltage range: 1.7 to 7V DC) Vsp high : Faster ;...
Page 75 < Reference > When operation stop with LD301 blinks 12 times, it may be caused by faulty DC fan motor. In this case, please check CN6 and CN12 connection first. It makes Fan Motor Lock also if those connectors are in misconnection. DC Fan Motor has broken invites 1A Fuse burned.
Page 76: Dehumidifying Mode
SERVI E ALL Q & A MODEL RAS-25JX4 / RAC-25JX4 RAS-35JX4 / RAC-35JX4 OOLING MODE The compressor has Check if the indoor heat If the air conditioner operates stopped suddenly during exchanger is frosted. in cooling mode when it is cooling operation.
Page 77 UTO FRESH DEFROSTING Auto Fresh Defrosting is carried out : the After the ON/OFF button is pressed to stop heating, the outdoor unit is system checks the outdoor heat exchanger and defrosts it as necessary before stopping still working with the OPERATION operation.
Page 78 When the ÒSleepÓ timer is set during (1) The temperature arrives at the preset indoor operation, temperature and the air conditioner unit is (1) The indoor fan wonÕt rotate. temporarily stopped. Within about 3 minutes, (No air comes from the unit) the fan starts rotation.
Page 79 TWO WAY AIR EXCHANGE MODE ¥ There is a restriction to the length of the two way air Up to what length the two way air exchange hose (maximum length is 3m). exchange hose can be extended? Is there any limit to the number of bending ¥...
Page 80 ROUBLE SHOO ING RAC-25JX4, 35JX4 PRECAU IONS FOR CHECKING Power inlet WARNING Remember that voltage of 175 V is applied to the 0V line on the P.W.B. or the like as shown in the right diagram. Always keep your hands WARNING and metallic things away DANGER!
Page 81: Minutes
DISCHARGE, PROCEDURE AND PO ER SHUT OFF METHOD FOR PO ER CIRCUIT ARNING Caution ¥ Voltage of about 350 V is charged between the terminal of smoothing capacitors (400µF x 2). ¥ During continuity check for each circuit part of the outdoor unit, be sure to discharge the smoothing capacitors.
Page 82 TRUCTURE OF AN INDOOR UNIT ELECTRIC PART RAS-25JX4, 35JX4 Screw for fix electrical parts Ｅｌｅｃ - ｃｏｖ - ｕ Screw for fix wire of earth Ｅｌｅｃ - ｃｏｖ - ｓ...
Page 83 ther Cautions (1) Cautions concerning ICP (IC Protector) 1. Use due caution for short circuit in servicing. Short circuit will open the ICP immediately. 2. When the ICP opens, remove the cause of this phenomenon and replace the ICP. If the remedy is improper, the ICP may open again. 35V line ICP2 Indoor unit fan motor...
Page 84 HE SUPPOR FUNC ION OF FAILURE DIAGNOSIS Description Function Name Self-diagnosis indication ¥ The "timer lamp" indicates the failure mode detected on the indoor unit side by function its blinking frequency while the "filter lamp" indicates the failure mode detected on the outdoor unit side by its frequency.
Page 85 elf-Diagnosis Memory Function This function is to display the diagnosed failure modes stored in the non-volatile memory of the indoor unit by remote controller operation. This is effective to check the failure mode in the case where the power was turned off or operation was restarted without checking the lamp blinking frequency.
Page 86: Minutes
TROUBLESHOOTING WHEN TIMER LAMP BLINKS. MODEL RAS-25JX4, RAS-35JX4 Perform troubleshooting according to the number of times the indoor timer lamp. SELF-DIAGNOSIS LIGHTING MODE MODEL RAS-25JX4, RAS-35JX4 Blinking of Timer lamp Reason for indication Possible cause Reversing valve defective (1) Reversing valve defective...
Page 87 Perform troubleshooting according to the number of times of the indoor filter lamp blink. Filter lamp blink mode Reason of indication Possible cause Peak current cut Reference the outdoor self 2 times 2 sec. diagnosis lamp blinks, to perform the trobleshooting. Abnormal low speed rotation 3 times 2 sec.
Page 88 ELF-DIAGNO I LIGHTING MODE MODEL RAC-25JX4, RAC-35JX4 INTELLIGENT POWER MODULE LD301 SELF DIAGNOSIS LAMPS LD302 SERVICE SWITCH LD303...
Page 89 OUTDOO UNIT emove the compressor connector. INTELLIGENT POWER MODULE LD301 SELF DIAGNOSIS LAMPS LD302 SERVICE SWITCH LD303 ¥ Check the drive If your first attempt With the unit set in the operating circuit (IMP) using fails, wait 3 minutes state, press the start/stop the PRD checker.
Page 90 HE KING THE INDOOR/OUTDOOR UNIT ELE TRI ALPARTS AND REFRIGERATING Trouble shoot according to the Is the indoor unit "timer lamp" blinking? self-diagnosis lighting mode. Open the indoor unit and check the voltage Run the unit using the following remote controller settings: between pins Nos.1 and 3 of CN3 on the In the cooling season, set the temperature to 16 in the cooling...
Page 91 HE KING THE INDOOR UNIT ELE TRI AL PARTS 1. Power does not come on (no operation) Is AC220-230V being generated between Is AC220-230V being generated at Check AC outlet and breaker, and terminals A and B on the indoor unit AC outlet? repair any defective part.
Page 92 2. Indoor fan does not operate (others are normal) The microcomputer fan PWM Can the fan be stopped by remote Replace the microcomputer . output (at pin 24 ) is 1 - 5V. control? Replace the fan motor . Replace the microcomputer . Perform final operation check.
Page 93 4. Check the control P.W.B. (power circuit) Is 35V being output at pin 5 Check to see if the connection cables are relative to 0V at pin 3 of disconnected or reversed. CN3? If normal, check the outdoor unit P.W.B. Is 12V being output at (+) Is ICP1 normal? relative to 0V at (-) of...
Page 94 5. Failure Phenomenon: Ventilation fan motor does not operate <Situation> Ventilation fan motor does not operate. Two way air exchange lamp blinks (lit for 4 seconds and off for 1 second). ÒTimer lamp blinks 16 timesÓ is not stored in the self-diagnosis memory. <Assumed points of failure>...
Page 95 6. Failure Phenomenon: Two way air exchange lamp blinks <Situation> Two way air exchange lamp blinks (lit for 4 seconds and off for 1 second). Dirt sensor is not functioning. ÒTimer lamp blinks 17 timesÓ is not stored in the self-diagnosis memory. <Assumed points of failure>...
Page 96 HE KING THE REMOTE ONTROLLER Is battery polarity correct? Install the battery in the correct polarity. Is the battery check sign + Replace the battery. flashing? Turn on an AM radio, bring the remote control switch within 15 cm of the radio, and press the ON/OFF button.
Page 97 ARNING PRECAUTIONS FOR SERVICING Be sure that the power switch is turned off or the power cable is disconnected before servicing. Removing the P. .B.s. System Configuration of Outdoor Unit Electrical Parts The outdoor unit electrical parts consist of two P.W.B.s as shown in the figure. <Control P.W.B.
Page 98 [C. Power Factor Improvement capacitor] Designed to improve power factor. To replace the capacitor, remove the power P.W.B. and then: 1. Remove two screws fastening the capacitor seat. 2. Slide the capacitor seat in the direction of the arrow. Sliding Direction...
Page 106 HE KING THE REFRIGERATING Y LE (JUDGING BETWEEN GAS LEAKAGE AND COMPRESSOR DEFECTIVE) 1. Troubleshooting procedure (No operation, No heating, No cooling) Lighting mode Blinks Blinks Blinks Blinks Blinks Blinks Connect U,V,W phase leads to the Self- 2 times 3 times 4 times 5 times 6 times...
Page 107 HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT MODEL RAC-25JX4, RAC-35JX4 1. Turn off the power switch. 2. Remove the electrical box cover. 3. Turn on the power switch 4. After waiting for 30 seconds, push the service switch for a second. D303 (red) will light and the unit will operate in the forced cooling mode at this time.
Page 108 PM ( ntelligent Power Module) D AGNOS S SSM1001MA Circuit diagram of Collector the device Emitter Circuit diagram of the module Terminals symbol mark of the module See next page for measuring value using multimeter...
Page 109 To find the malfunction either the power supply of power P.W.B. or internal IC, please follow the...
Page 110 ROCEDURE FOR DISASSEMBLY AND REASSEMBLY INDOOR UNIT MODEL RAS-25JX4, RAS-35JX4 〈〉 2. Top Grill, Front Cover 1. Front anel, Air urifying Unit (1) Hold both sides of the front panel and lift up. (1) Lift up while pressing the top grill and remove from tab. (3...
Page 111 . Indication/Reception P.W.B. 6. Dew-free assembly (1) Remove the lead wire (CN2). (1) Detach the claws (2 points) fixed to the cabinet. (2) Detach the claws for fixing the P.W.B. and pull out the (2) Hold the both sides of the dew-free assembly and P.W.B.
Page 112 (6)Remove each connector and earth cable from OUTDOOR UNIT MODEL RAC-25JX4, RAC-35JX4 〈〉 the lead wire. . Electrical parts (7)Remove four lock screws from the main P.W.B. (1)Remove the service value cover lock screws and pull two support hooks at the front side to and lower the cover to remove it.
Page 113 ARTS LIST AND DIAGRAM INDOOR UNIT MODEL: RAS-25JX4, RAS-35JX4...
Page 114: Indoor Unit
INDOOR UNIT PARTS NO. Q'TY PARTS NAME RAS-25JX4 RAS-35JX4 HWRAS-D10EX CABINET HWRAS-D10EX UPPER COVER HWRAS-D10EX FAN MOTOR 25W 1.1KG HWRAS-D10EX GRILL HWWSI425 TANGENTIAL AIR FLOW FAN HWRAS-D10EX FAN SUPPORT ASSEMBLY HWRAS-D10EX FAN COVER HWRAS-D10EX FAN MOTOR SUPPORT HWRAS-D10EX EVAPORATOR ASSEMBLY...
Page 115 INDOOR UNIT PARTS NO. Q'TY PARTS NAME RAS-25JX4 RAS-35JX4 HWRAS-D10EX P.W.B. (GAS SENSOER) HWRAS-D10EX CONNECTING CORD (3P) HWRAS-D10EX ELECTRIC BOX HWRAS-D10EX ELECTRIC COVER (LOWER) HWRAS-D10EX COVER (POWER SWITCH) HWRAS-D10EX SUPPORT (INDICATION P.W.B.) HWRAS-D10EX SUPPORT (MAIN P.W.B.) HWRAS-D10EX SUPPORT (POWER SWITCH)
Page 116 OUTDOOR UNIT MODEL: RAC-25JX4, RAC-35JX4...
Page 117: Outdoor Unit
OUTDOOR UNIT PARTS NO. Q'TY PARTS NAME RAC-25JX4 RAC-35JX4 HWRAC-D10EX BASE HWRAC-D10EX COMPRESSOR 750W 8.1kg HWRAC-25YH4 COMPRESSOR RUBBER HWRAC-25YH4 PUSH NUT HWRAC-D10EX CONDENSER HWRAC-D10EX SERVICE VALVE ASSEMBLY HWRAC-D10EX SOUND PROOF COVER ASSEMBLY HWRAC-E08H O.L.R COVER HWRAC-25YH4 O.H THERMI.SUPPORT HWRAC-E08H CONNECTING CORD (COMPRESSOR) HWRAC-D10EX THERMISTOR (DEFROST) HWRAC-25YH4...
Page 118 OUTDOOR UNIT PARTS NO. Q'TY PARTS NAME RAC-25JX4 RAC-35JX4 HWRAC-25YH4 BUSH ASSEMBLY HWRAC-25YH4 BUSH HWRAC-25YH4 DRAIN PIPE HWRAC-25YH4 COVER (CAPACITOR) HWRAC-E08H CORD ASSEMBLY HWRAC-D10EX REVERSING VALVE ASSEMBLY HWRAC-D10EX ELECTRIC EXPANSION VALVE ASSEMBLY...
Page 119 W NO. 0005E R S-25JX4 / R C-25JX4 R S-35JX4 / R C-35JX4 rinted in Japan (TSK)

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